Lock



FIG. 1 is a perspective view of a lock, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a cross sectional view thereof taken along line 8-8 in FIG. 2. 

CLAIM We claim, the ornamental design for a lock, as shown and described. 